The GUI is excellent! At the begin is not clear enough how to keep wallets secure via Backup. I mean, any person that can access the computer is able to open, check and close the app without any password required. Once you deposit some coins to the wallet, the backup option allows to create a password, wich is required every time that the app is launched.<br/>4 stars! I'll get the 5th when the iPad or iPhone apps be available.